After news broke about an airport meeting between former Attorney General Loretta Lynch and former President Bill Clinton in the midst of last year’s presidential campaign, the FBI scrambled to identify the source who leaked details about the encounter and discipline him or her, according to emails released on the FBI website on Friday. The internal emails show that on June 29, 2016, a senior spokeswoman for the Justice Department emailed her counterparts at the FBI to flag articles that were starting to appear about the meeting. In the email, the spokeswoman, Melanie Newman, described the encounter as “a casual,...